elaborate verse form employed by medieval Provençal and Italian, and occasional modern, poets. It consists, in its pure medieval form, of six stanzas of blank verse, each of six lines—hence the name. The final words of the first stanza appear in varied order in the other five, the order used by the Provençals being: abcdef, faebdc, cfdabe, ecbfad, deacfb, bdfeca. Following these was a stanza of three lines, in which the six key words were repeated in the middle and at the end of the lines, summarizing the poem or dedicating it to some person.

The sestina was invented by the Provençal troubadour Arnaut Daniel and was used in Italy by Dante and Petrarch, after which it fell into disuse until revived by the 16th-century French Pléiade, particularly Pontus de Tyard. In the 19th century, Ferdinand, comte de Gramont, wrote a large number of sestinas, and Algernon Charles Swinburne's “Complaint of Lisa” is an astonishing tour de force—a double sestina of 12 stanzas of 12 lines each. In the 20th century, Ezra Pound, T.S. Eliot, and W.H. Auden wrote noteworthy sestinas.